Picking an ADC plz help

So i am s5 and play allot of ADC i use to main graves and lucian but now idk what i do now. Graves is a better jg than a laner and lucian will still be a trash pick no matter what ;(. I've tryed allot of them out but i still don't know what i want to do, i've gotten a penta on vayne and MF but i say i was lucky that's it. Plz help if you see some thing in the ADCs i play or know whats good for ADC RN